US48546A - Improved saw-gummer - Google Patents

Description

' d UNITED? f STATES' lPATnivT-` Orricn.

`A. IC. FOSTER, on HALLn'rrsviLLnTEXAS.

iMPnovo SAW-cumin En.

'Spceiiirntion forming part nl" .letters Patent No. 448,546, dated July 4, 1865.. 1

a full, clear, and exact description of the samen! reference being had tothe accompanying draw- 1. whichi ings, making'a part ,of this specification,..in4

. y Figure lis a side sectional viewof mydnventio taken-in the lineaw, Fig. 2; Fig. 2,-al plan \ot\r. top View of the same; Fig.' 3, a vertical secf ion of a portion of thesanie, taken in the line' inilletfers of nreference indicatecorre- Uspouding. parts in theseveraligures.-

vl-lhi'siinvention' relates tol'a new and improvedV i sawgumminginachine ot that class in which l a grindstone is employed for performing Athe work.` y 4 Theinvention'consistsin using,.in connection vitha grindstone, an. adjustable and a-.sliding barand levers, one of 4which is provided with a. jaw or clamp, and all the parts so arranged as to ,admit` of the work beingperformed in an ex ,peditiousand' perfect manner. A r

Y To, enable those skilled 'n the art to fully understand and construct niy inventioin' lwill proceed to describe it. l .A represents the frame of the machine, which may befconstructed in any proper manner to support the workingparts. ,i

Bdea mandrelor arbor placed on the upper .i part df the frame A, and having upon it a driving-pulley,v C, and a' grindstone, Db`oth of which are shown in Fig. 2.; 4The face ofthe' grindstone is' made4 ofbeveledform, -as shown at "a,\andronnded at its `outer edge, asshown at brand-'a cap',E;is-placed over its 'top to preventv the'wat'er used in the operation being '.thrownfb'ythe4 grindstone upon the attende nt.'v F'represents a bar, which is placed upon-.the rtop ofthefra-meA, and hasa longitudinal refss y made initsnnder side,so as to form a shoulder, c',

near' eachend of it, between which shoulders andthe usides"of,tl1e ira1ne Awedgesdare inteposed to' secure the bar FV in the desired ,gpo-A y'sitiori-. This bar Fuhas `a slot, e,`made init,

' lwhich extends nearly its whole length,;and' to said .bar there vis secured, by a set-screw, j,

stop, G. (Shown in Figi) r H is aV bar, wh'ch valso has a slot, g, made in, it, extending nearly its whole length. .Dhisbar,` E isplaced upont-he bar F, and the formeris' provided with a pendent pin, h, at one end,

`Qn the 4bar H there is secured by set-screwsz. anotcnedblock, Land J is a lever,which passes` through theblock I and has its fulcrum'pin j.

shown ir. FigfZ. s y i K'is a lever, thefulcrum-pin k ofwhich passes.dv through the bar H at the endopposite tothat passing into the upper part of the framing, as

where the pin h is attached. This'i'ulcrum-pin 7c passes through' the slotg of har H, and also Vtheough the slot c of bar F. The leverK has' an oblongslot, l, made-longitudinally in it, to admit 4of a curved lever, L, passing'through git, said lever-werkingen a fulcrum-pin, m,which passes horizontally throughany of aseries-of holes, min lever K. (SeeFig. 3.) This leverV .L performs the office of ajawor clamp, as hereinafte'r explained.

Mis a-circular saw, which is fitted on the fuli erum-pin k) underneath the bar H, said saw restingon the bar-Fthe inner endof tlhe'jaw or clamp Lvbeing underneath the, saw

The operation is as follows: .Thebar F is adjusted to'suit the size of the saw M and thean-f gie of the teeth required: Suppose, for instance, a saw be forty-eight inches in diameter, and it l is desired to have its teeth'ran'ge twelve inches from the center,V the har .F.'is so adjusted that its slot e will be twelveinches `from the front sdeof .the 'grindstone l The'se'veral parts are, then adj usted together, or placed as previously described, the teethof the saw pointingtoward the grinds'tone. The operator o r-` attendant standsfacingthe grndstonewith nis Einhand' restingl upon lever .J 'and his left, hipgently j v pressin gsaid lever towardthe grind stone,while his 'right hand grasps the lever K and the jaw 'for clamp L, and through the medium of Vwhich the` saw M is rotated, and by relieving the jaw@ or clamp L ofpressure the lever Kean4 be moved l forwarder backward-without moving or rotat-` "ing the saw. The grindstone is rotated with` high velocity,and the saw is brought up t0 which prjectsdown through the slot e of har F.

it by actuating the lever J ,ya stream of vwater M being prevented f|'om rotating by clamping.`

being allowed to pass upon the grindstone at itrmly with lever-K and the olampo'rjaw its point of contact with thesaw. L, and the lever J is then pressed toward lthe 'It is yimport-ant that the grindstone be not. grindsto'ne until-thesliding barHeomesin conallowed to act with both sides at once upon the'. tact with the stop G, which may be adjusted saw, as that wouldvcause the grindstone to run from time tortirne to compensate for the wear heavily and subject'it to great Wear and ma.-. ofthe stone. `f t i V terially retardits work. The grindstonecoiu- The advantages of this invention consist-in -menees itsdvork at'the point ot the tooth at the itscheapne'ss and simplicity, capable of being `stone through the medium of lever J. lWhen back ofthe saine, 'and by ineens ot the levers .used without the liability ofinjuring the saw. J and K the saw is presented to the grindstone the latter being under the eomplete'reontrol of anda kerf is made in ther saw threes-si'xf the operator. l y ttenthsvor,y one-fourth of an inch, said kerf'exf Havingthus described my invention, what tending to the bottomvot vthe tooth. This op I claim `as new, and desire to secure by Leteration is repeated until the back of the tooth ters Patent, is-

is ot' the`desired shape. The stop Gr'on the l The grindstonel), with the adjustable'bar F, bar '11 'determines the depth ofthe out of'the l sliding' bar H, and vwith the levers .IK and grindstone, and the saw has the proper feed clanlip orjaw infor theirA equivalents, allarniovement given it b v rotating it through the ranged,in connectionwith'thesawM,tooperate medium' of the lever K and the clamp orjaw substantially in the manner as andfoxthe purL/ L, while pressing it forward toward the vgxindpose herein set forth'.

A. K.' FOSTER.

thevback -ot' the tooth is finished the front of I W itnes'ses: the succeeding tooth is brought in exaotrange M. W. WHEELER, with the front side^ of the grindstone, the saw D. S. CARNDHAN.`

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